Re: st: Tests for trends in RCT subgroups (-metan-, -meta-, other?)

[Roger Harbord <roger.harbord@bristol.ac.uk>]

There's a Stata faq on tests for trend that is well worth reading:
<http://www.stata.com/support/faqs/stat/trend.html>

Not completely clear from your description of the problem but i doubt that 
meta-analysis commands are the way to go.

Roger.

--On 10 June 2005 15:45 +0100 Matthew Sydes <Matthew.Sydes@ctu.mrc.ac.uk> 
wrote:


> [Using Stata 8; impending upgrade to Stata 9]
>
>
> Good afternoon,
>
> > I am interested in performing tests of trend in ordered subgroups from a
> > single randomised controlled trial.  It is possible to use meta-analysis
> > commands for this purpose, pretending that each subgroup is a separate
> > trial.  I have investigated the -meta- and -metan- commands.  However,
> > their tests for heterogeneity only seem to deal in global tests rather
> > than tests for trends.
> Like numbers-at-risk on KM plots, subgroup trend tests are an issue I
> often wrangle with and find that I can solve only outside of Stata (albeit
> somewhat unsatisfactorily and unloggable fashion).
>
> Any help on how I may address this matter within Stata would be much
> appreciated.
>
> > Kind regards,
> >
> > Matt
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